Other than brands... the OP's options are rather limited.
Oil-based with UV protection in a matte finish really demands a product like the Proluxe.
The Helmsman Spar is a polyurethane with UV protection so the poly doesn't yellow and peel. I highly suggest its use on wood doors, but I cannot get it in a matte finish.
ZAR makes an exterior oil-based matte polyurethane.
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